Sound-transmitting apparatus



G. DI GIACOMO AND L. MELCHIORRI- SOUND TRANSMITTING APPARATUS APPLICATION 11.50 MAB. us, 1921.

Patented Mar. 28, 1922.

r vide improved sound transmitting UNHTD STATES PATE its.

GEN EROSO DI GIACOMO AND LOUIS MEI-CHIORRI E, 0F PHILADELPHIA, PENNSYLVANIA.

To all whom it may concern.

Be it known that we, GENnRosoDr GIA-' c0110 and LOUIS MELCHIORRI, both citizens of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Sound-Transmitting Apparatus, of which the following is a specification.

Our invention relates to improvements in sound transmitting apparatus for talking machines and particularly those of a port-- able type.

The principal objectof our invention is to provide in a portable type of talking ma chine provided with a boxed lid hinged to the body of the machine so that when in an open position said lid is on a horizontal plane with the top thereof, of an improved sound transmitting apparatus, adjustably positioned on said lid, whereby the tone re- )roduction is taken directl from the needle,

amplified through the single medium of the tone or sound arm as the sound passes through the tapering turns and out a bell shaped terminus thereof. striking against the surface of said lid which lid thereby arts as a resounding chamber transmitting the sound vibrations to the open air; reproducing the original sound with accuracy and preserving the clearness of the modulated solo tones and the virile harmony of the chorus or the orchestra.

A. further object of my invention is to proapparatus for talking machines which renders it unnecessary to employ a horn or cabinet construction.

A further object of the invention is to provide a construction in a device of the class described that is simple, durable and one that can be manufactured and sold at a reasonably low cost.

These objects and other advantageous ends we attain by means of the mechanism hereina'fter described, reference to be had to the accompanying drawings, in which Figure 1 is a perspective view of our talking machine in playing position;

Figure 2 is a vertical sectional view of the tone arm employed;

Figure 3 is a transverse sectional view on the line 3-3 of Fig. 2, and

Figure 4 is a top plan view of the pyramidal cover for the cup on the lid of said Specification of Letters I fatcnt.

. Application filed March 16, 1921.

on a' horizontal SOUND-TRANSMITTING APPARATUS.

Patented Mar. 28, 1922.

Serial No 452,794, 1

machine in which the spindle ofthetone armi'ests. I. I i r Like reference 3 characters refer-to like parts throughout the drawings.

Referring to said drawings in detail the numeral 10wrepresentsa portable case for a talkingrmachine provided with the table or support 11 for a turn table 12 on which is positioned a disc record 13 in theconventional manner. A spindle 14 extends through said turn table 12 and record l3 'and motor means, (not shown) positioned within said case 10 and beneath said table 11 are employed to rotate said spindle 14,Which in turn rotates the turn table 12 and the disc 7 13 thereon. v i I Said case 10 is also provided with the boxed lid or cover 15, hinged as at 16, so that when in an open position said lid is plane with the top of the body portion of said case 10. j

swiveled,' as at 1?, tone arm 17 hav ing the tapering turns therein'as 'illustrated, ,is provided with the sound box 18 having a needle connection 19 for engage- 8 ment with a record 13 on the turn table 12, as is common in machines of this character. Said case 10 is also provided with a handle 20 for carrying purposes and locking means 21 and 21 to secure the lid 15 to the body portion of said case 10, when desired.

Admission is gained to a compartment beneath the table or support 11 in the case 10 by means of a hinged door 22. The tone arm 17 may be stored within this compartinent when not in use.

The said tone arm 17 at its opposite extremity from the sound box 18 is bell shaped as at 23 and at the base thereof a longitudinal brace 26 is secured to threaded bosses 28 and 29, provided on the interior of the base ofsaid bell shaped portion 23 of said tone arm 17, by means of screws 30 and 31. v

A spindle 24 fits loosely in a socket 35 provided on a boss 36 on the interior of the upper part ofthe bell shaped portion 23 of the tone arm 17, as illustrated: said spindle 24 extends downwardly through an opening 27 provided in the horizontal brace 26, thus preventing lateral displacement of said spindle 24. A pin 25 through said spindle 24 adjacent the inner side of said brace 26 prevents vertical displacement of said spindle 24.

placed in engagement The projecting end32 of said spindle 2% is tapered and rests loosely in a socket or cup 33 provided in the lid 15 said cup extending through said lid and having =1 pyramidal cover on the outer side of said;

lid and is securedon the inner side of said lid by means of screws 34 as illustrated particularly in Fig.3. The said tone arm 17 is obviouslyreadilyremovable from its connection with the lid 15 Without removal of the spindle 24E.

In operation: open position or on a The lid 15 is placed in an horizontal plane with the body of the case 10 as illustrated in Fig. 1.; the spindle 24c is inserted in the socket 38 and the needle. connection '19 is with the record 13. As said needle 19 follows the grooves or indentations of saidrecord 13, the tone arm to which it is connected follows, it being rotatable onthe spindle 2 1. .The sound vibrations from said record aretransmitted through-the sound box 18 and amplified by the tapering turns of said tone arm 17 and pass out through the bell shaped terminus 23'thereof, striking against the surface of thelid 15 whereby they are transmitted to the open air. considerably abovethe surface of theturn table 12fso that it may be utilized'to hold records-when the machine is not in use.

Itawill now be apparentthat we have'de vised a novel. and useful construction which The spindle 14 may extend invention and the above description, andx while we have in the present instance shown and described the preferred embodiment thereof which has been found in practice to give satisfactory and reliable results, it is to be understood that the same is susceptible of modification in various particulars without departing from the spirit or scope of the invention or sacrificing any of its advantages. 7

Having thus described our invention what we claim as new and desire to secure by Let? ters Patent is 7 In a portable sound reproducing machine, a hinged lid for the casing of the machine, said lid being adapted to bearra-nged in a plane parallel to the plane of the turn table of the machine, a tone arm, a spindle supporting one end of'the'tone arm, and a socket mounted in the lid with its inner end substantially flush with the inner surface of the lid and its outer end projecting beyond the outer surface of said lid, said length to detachably receive and pivotally support one end of the spindle.

In testimony whereof we afiix our signatures. a

5 ennnnoso m GIACOMO.

socket having a bore of substantial.

LOUIS MELonioR-nr, 

